1905. | OF THE GENUS RHINOLOPHUS. 85 
width at base, at middle, and at summit: 2, 1°8, and 1:7 mm. 
Lancet almost cuneate, or the lateral margins but slightly concave, 
never abruptly narrowed at the middle (as i in Fh. rout) ; length 
of lancet about 4°2mm,. Ears and wings quiteas in Rh. celebensis. 
Plagiopatagium inserted on tarsus, or as much as 1°5 mm. above 
the tarsal joint. 
Colowr. There is an extreme dark phase and an extreme red 
phase, connected by several intermediate stages. 
(1) Dark phase.— ?, Banguey Isl. (Brit. Mus.); two ¢, Pulo 
Sarutu (Un. St. Nat.-Mus.); all of them full-grown, but with 
unworn teeth; distal epiphyses of metacarpals in two of them 
ossified, in one not completely so; in alcohol, unfaded. General 
impression of upper side: brown. The true colour isa deep brown 
shade of “drab”; base of hairs next to ‘ broccoli-brown.” 
Under side between ‘‘ wood-brown ” and “ broccoli-brown.” The 
individuals are not precisely, but almost, alike in tinge. 
(2) Intermediate stage, nearer to “ dark phase.”— gad., Qad., 
Labuan (B.M.); ¢ ad., N.W. Borneo (B.M.); teeth either quite 
unworn, or almost wnworn,; distal epiphyses of metacarpals ossitfied ; 
in alcohol, unfaded. Upper side “russet,” base of hairs but 
slightly lighter. Under side ‘‘ wood-brown.” 
(3) ian emediate stage, nearer to “red phase.” — @ ad., Sirhassen 
(URNES Ms) co Grade 2 afl. Karimata(U. N.S, M.); teeth either 
quite unworn, or very slightly worn; distal epiphyses of meta- 
carpals ossified ; in alcohol, unfaded. Much like the foregoing, 
but also the under side of the body “ russet.” 
(4) Extreme red phase.— g ad., Sirhassen (B.M.); teeth wn- 
worn; epiphyses ossified; in alcohol, unfaded. Much like the 
extreme red phase of 2A. rowxi: not far from “ cadmium orange” 
above; ‘“‘ orange” beneath. 
As proved by the above, these differences in colour are inde- 
pendent of the geographical habitat and of the sex of the 
individuals, seemingly also of the age. So far as the present 
material goes, the only “ phase” in which a quite young, though 
full-grown, individual occurs (epiphyses not quite ossified) is the 
dark phase; but it may be accidental: the individual which 
represents the extreme red phase is, at all events, only a few 
months older (teeth unworn). 
Skull. As in Rh. ¢elebensis, but with broader nasal swellings 
(5:4 mm., on an averzge), 
Dentition. ps almost always completely external, but in one 
skull (out of eleven) half in row. Cingula of p, and p, in contact 
(six), or very slightly separated (four), or distinctly separated 
(one), p always in the tooth-row; cusp very small. In four 
individuals there is an extremely narrow interspace between p* 
and p* (the former place of p’). 
Distribution. N. Borneo; 8. Natunas; Karimata Group. 
Technical name. The type of Rh. borneensis, in the Berlin 
Museum, is from Labuan, There are two specimens from the 
